Tilting furnace



W. DYRSSEN. v

' TILTING FURNACE.. APPLICATION FILED nscfz. 1920.

Patented May 23, 1922.1

UNITED STATES wannmua nYnssEN, or yNew You, N. Y;

TILTING remmen Specicationof Letters Patent. Patented May 2,3 1922.

Application med December 2, 192e. serial No. 427,778.

To all whom may' concern.' a

Be it known that I, WALDEMAR DYRssEN,

a subject of. the King of Sweden, and resi-l dent of the city, county,and State of New York, have invented certain new and useful Improvementsin Tilting Furnaces, of which the following is a specification.

My invention aims t'o provide certain improvements in the mechanism forcontrolling the tilting movement of furnaces by which the power requiredfor the tiltingoperation is comparatively low, and whereby otheradvantages may be secured as hereinafter described.

The accompanying drawings illustrate a furnace embodying the inventlon.

Fig. 1 is a side elevation and Fig. 2 apartial cross-section on the line2-2 of F1g..1.

vThe furnace 1 is an electric tilting furnace, the invention beingparticulary designed forthis class of apparatus.v t has electrodes 2passing down through the roof, each. carried by a holder 3 with an arm 4supported on a post 54 guidedon the side of the furnace and-operated bymotors mounted also on the rear side of the furnace. The

mechanism for supporting and adjusting the 4electrodes may be of anyusual or suitable type and is not illustrated in detail, the par ticulararrangement indicated being coveredin detail in an application of JamesH. Gray No. 423,867 filed November 13, 1920 and pending concurrentlyherewith. y

The furnace has a spout for pouring the molten metal, when the furnaceis tilted, into a ladle 7 On the bottom of the furnace are mountedrockers 8, usually two in number, the lower faces of which bear ontracks 9 supported on the foundation 10. Each of the rockers isconnected near its rear end with a link 10 mounted on a crank pln on agear 11 whichis driven by'separate intermediate gearing from a motor 12.As the gear 11 is rotated the furnace is tilted to 1ts pouring positionand back to its upright or working position. Each of the rockers` 8 isprovided atone side with a toothed portion 13, Fig.. 2, engaging asimilar toothed portion 14 on the corresponding track member 9. Thecenter of rotation of the furnace 1s indicated at 15. Thetoothedengagement of y the rockers with their tracks prevents. any

slipping between these parts or any turning of the furnace sidewiseduring the. tilting' movement.-

The bearing faces' of the rockers and tracks respectively are so shapedthat as the furnace is tilted its center of rotation 15 will moveforward and along a substantially or approximately horizontal line 16 tothe position shown in .dotted lines. Various curvatures may be given tothe opposed bearing faces of the rockers and tracks in order to securethisy resultl Preferably a convex curvature is given to each of theopposed bearing faces; Were either of the op posed bearing faces madeflatter, the .other face would have to be more sharply curved to securethe same movement of the center. By making them of approximately equalconvex curvature the space occupied by them in a vertical direction isreduced to aminimum, and this is advantageous artcularly in the case oflarge furnaces.' eadroom is saved, weight is reduced and ythe actualcost of the rockers is reduced to about half.

The moving of the furnace forward as it is tilted to the pouringposition avoids having to place the ladle close against the furfnace, asit has been necessary particularly where furnaceshave been pivoted at afixed point. `The movement along a substantially horizontal linerequires a minimum of power for the tilting operation.

The bearing faces may be such as to give an exactly horizontal movementto the center of gravity of the furnace. Preferably, I' however, for thesake of safety I design` the lbearing faces so that the center ofgravity will be below the center of rotation and will be given a slightlift in moving from the upright to the tilted position, just sufficientto cause thel furnace to return to its upright position in case ofbreakage of the tilting gearing, or similar accident.

, In determining the curvatures of the rock ers and tracks I first findthLe center of gravity of the furnace and select a point a few inches(say sixto twelve inches) above it as my center of rotation; that is,the `point which I desire to move in a practically horizontal line intilting. The radius of the equal radii and if the center of rotation-15is located half way between the face of the rocker and its center, itwill have a substantially straight horizontal movement throughout thedistance necessary to tilt the furnace.

Though I have described with great particularity of detail a certainembodiment of my invention, yet it is not to be understood rolling oncurved tracks, the bearing faces being shaped to produce anapproximately horizontal movement, of the center of gravity of thefurnace.

2. lA tilting furnace provided with rockers rolling on tracks, thebearing faces of the rockers and tracks respectively being convexlycurved and of approximately equal curvature.

3. A tilting furnace in combination with means for moving it forward onan approximately horizontal line as it is 'tilted and slightly elevatingits center of gravity in the tilted position.

In Witness whereof, YI havehereunto signed my name.

`VVALDEMAR DYRSSEN.

